Remove apex_available whitelist for the ART APEX

The marked library(ies) were available to the APEX via the
hand-written whitelist in build/soong/apex/apex.go. Trying to remove the
whitelist by adding apex_available property to the Android.bp of the
libraries.

Exempt-From-Owner-Approval: cherry-pick from internal

Bug: 150999716
Test: m
Merged-In: I2b792657b444f0c963e1e92b7c91f6a0cfe1688c
(cherry picked from commit be6e2b6a)
Change-Id: I2b792657b444f0c963e1e92b7c91f6a0cfe1688c